{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-23273", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-23273", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-03-20T08:08:54.111Z", "updatedAt": "2026-10-19T18:35:41.003Z", "importedAt": "2026-10-24T01:58:02.025Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "macvlan: observe an RCU grace period in macvlan_common_newlink() error path", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nmacvlan: observe an RCU grace period in macvlan_common_newlink() error path\n\nvalis reported that a race condition still happens after my prior patch.\n\nmacvlan_common_newlink() might have made @dev visible before\ndetecting an error, and its caller will directly call free_netdev(dev).\n\nWe must respect an RCU period, either in macvlan or the core networking\nstack.\n\nAfter adding a temporary mdelay(1000) in macvlan_forward_source_one()\nto open the race window, valis repro was:\n\nip link add p1 type veth peer p2\nip link set address 00:00:00:00:00:20 dev p1\nip link set up dev p1\nip link set up dev p2\nip link add mv0 link p2 type macvlan mode source\n\n(ip link add invalid% link p2 type macvlan mode source macaddr add\n00:00:00:00:00:20 &) ; sleep 0.5 ; ping -c1 -I p1 1.2.3.4\nPING 1.2.3.4 (1.2.3.4): 56 data bytes\nRTNETLINK answers: Invalid argument\n\nBUG: KASAN: slab-use-after-free in macvlan_forward_source\n(drivers/net/macvlan.c:408 drivers/net/macvlan.c:444)\nRead of size 8 at addr ffff888016bb89c0 by task e/175\n\nCPU: 1 UID: 1000 PID: 175 Comm: e Not tainted 6.19.0-rc8+ #33 NONE\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014\nCall Trace:\n\ndump_stack_lvl (lib/dump_stack.c:123)\nprint_report (mm/kasan/report.c:379 mm/kasan/report.c:482)\n? macvlan_forward_source (drivers/net/macvlan.c:408 drivers/net/macvlan.c:444)\nkasan_report (mm/kasan/report.c:597)\n? macvlan_forward_source (drivers/net/macvlan.c:408 drivers/net/macvlan.c:444)\nmacvlan_forward_source (drivers/net/macvlan.c:408 drivers/net/macvlan.c:444)\n? tasklet_init (kernel/softirq.c:983)\nmacvlan_handle_frame (drivers/net/macvlan.c:501)\n\nAllocated by task 169:\nkasan_save_stack (mm/kasan/common.c:58)\nkasan_save_track (./arch/x86/include/asm/current.h:25\nmm/kasan/common.c:70 mm/kasan/common.c:79)\n__kasan_kmalloc (mm/kasan/common.c:419)\n__kvmalloc_node_noprof (./include/linux/kasan.h:263 mm/slub.c:5657\nmm/slub.c:7140)\nalloc_netdev_mqs (net/core/dev.c:12012)\nrtnl_create_link (net/core/rtnetlink.c:3648)\nrtnl_newlink (net/core/rtnetlink.c:3830 net/core/rtnetlink.c:3957\nnet/core/rtnetlink.c:4072)\nrtnetlink_rcv_msg (net/core/rtnetlink.c:6958)\nnetlink_rcv_skb (net/netlink/af_netlink.c:2550)\nnetlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)\nnetlink_sendmsg (net/netlink/af_netlink.c:1894)\n__sys_sendto (net/socket.c:727 net/socket.c:742 net/socket.c:2206)\n__x64_sys_sendto (net/socket.c:2209)\ndo_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)\nentry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:131)\n\nFreed by task 169:\nkasan_save_stack (mm/kasan/common.c:58)\nkasan_save_track (./arch/x86/include/asm/current.h:25\nmm/kasan/common.c:70 mm/kasan/common.c:79)\nkasan_save_free_info (mm/kasan/generic.c:587)\n__kasan_slab_free (mm/kasan/common.c:287)\nkfree (mm/slub.c:6674 mm/slub.c:6882)\nrtnl_newlink (net/core/rtnetlink.c:3845 net/core/rtnetlink.c:3957\nnet/core/rtnetlink.c:4072)\nrtnetlink_rcv_msg (net/core/rtnetlink.c:6958)\nnetlink_rcv_skb (net/netlink/af_netlink.c:2550)\nnetlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)\nnetlink_sendmsg (net/netlink/af_netlink.c:1894)\n__sys_sendto (net/socket.c:727 net/socket.c:742 net/socket.c:2206)\n__x64_sys_sendto (net/socket.c:2209)\ndo_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)\nentry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:131)", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "da5c6b8ae47e414be47e5e04def15b25d5c962dc", "status": "affected", "versionType": "git", "lessThan": "91e4ff8d966978901630fc29582c1a76d3c6e46c" }, { "version": "5dae6b36a7cb7a4fcf4121b95e9ca7f96f816c8a", "status": "affected", "versionType": "git", "lessThan": "3d94323c80d7fc4da5f10f9bb06a45d39d5d3cc4" }, { "version": "c43d0e787cbba569ec9d11579ed370b50fab6c9c", "status": "affected", "versionType": "git", "lessThan": "721eb342d9ba19bad5c4815ea3921465158b7362" }, { "version": "11ba9f0dc865136174cb98834280fb21bbc950c7", "status": "affected", "versionType": "git", "lessThan": "19c7d8ac51988d053709c1e85bd8482076af845d" }, { "version": "986967a162142710076782d5b93daab93a892980", "status": "affected", "versionType": "git", "lessThan": "a1f686d273d129b45712d95f4095843b864466bd" }, { "version": "cdedcd5aa3f3cb8b7ae0f87ab3a936d0bd583d66", "status": "affected", "versionType": "git", "lessThan": "d34f7a8aa9a25b7e64e0e46e444697c0f702374d" }, { "version": "f8db6475a83649689c087a8f52486fcc53e627e9", "status": "affected", "versionType": "git", "lessThan": "1e58ae87ad1e6e24368dea9aec9048c758cd0e2b" }, { "version": "f8db6475a83649689c087a8f52486fcc53e627e9", "status": "affected", "versionType": "git", "lessThan": "e3f000f0dee1bfab52e2e61ca6a3835d9e187e35" }, { "version": "5.10.250", "status": "affected", "versionType": "semver", "lessThan": "5.10.252" }, { "version": "5.15.200", "status": "affected", "versionType": "semver", "lessThan": "5.15.202" }, { "version": "6.1.163", "status": "affected", "versionType": "semver", "lessThan": "6.1.165" }, { "version": "6.6.124", "status": "affected", "versionType": "semver", "lessThan": "6.6.128" }, { "version": "6.12.70", "status": "affected", "versionType": "semver", "lessThan": "6.12.75" }, { "version": "6.18.10", "status": "affected", "versionType": "semver", "lessThan": "6.18.14" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.19", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.19" }, { "version": "5.10.252", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.202", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.165", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.128", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.75", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.14", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "6.19.4", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.19.*" }, { "version": "7.0", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }